Saints assistant head coach Joe Vitt says witnesses in the NFL's bounty investigation of New Orleans' pay-for-pain system have lied about him and the organization and that their stories might change in federal court.

Vitt angrily said Thursday he feels the truth will come out in federal court, where the punishment for perjury can be jail time. He also once again vehemently denied that he kept the system going after the NFL began its investigation.

Vitt's comments come a day after transcripts obtained by The Associated Press showed former Saints defensive coordinator Gregg Williams testified during NFL appeal hearings that he tried to stop the Saints' cash-for-hits program, only to be overruled by Vitt.

Those same transcripts show Vitt denied Williams' allegation and offered to take a lie detector test.